diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index 001e366f3c..368bc9672a 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -32,6 +32,7 @@ allowed_tags = tags = ['b',
 						'p',
 						'pre',
 						'strong',
+						'sub',
 						'sup',
 						'table',
 						'tbody',
@@ -68,6 +69,7 @@ no_images = ['b',
 						'p',
 						'pre',
 						'strong',
+						'sub',
 						'sup',
 						'table',
 						'tbody',